/Engine/Plugins/Experimental/Mutable/Source/MutableTools/Public/MuT/NodeMeshFormat.h
Get and set the MeshBufferSet that defines the new format for the mesh faces. These buffers don't really contain any data (they have 0 elements) but they define the structure. If this is null, the vertex buffers will not be changed.
[FMeshBufferSet](API\Plugins\MutableRuntime\MuR\FMeshBufferSet) & GetFaceBuffers()